Preparation and photocatalytic activity of multi-modally macro/mesoporous titania

Preparation and photocatalytic activity of multi-modally macro/mesoporous titania
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多峰介孔二氧化钛的制备及其光催化活性

DOI:
10.1007/s11164-009-0107-8
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发表时间:
2009-12
影响因子:
3.3
通讯作者:
Cheng, Bei
Cheng, Bei
中科院分区:
化学3区
文献类型:
--
作者:
Wang, Wenguang;Huang, Baibiao;Yu, Jiaguo;Zhang, Xiaoyang;Cheng, Bei

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通过在钛酸四丁酯涂层上滴加蒸馏水,制备了分级无序的海绵状大孔/介孔二氧化钛。结果表明,未经煅烧的样品具有明显的光催化活性和多峰孔径分布。随着煅烧温度的升高,光催化活性和结晶度增加。在400°C时,煅烧样品的光催化活性最高。进一步提高焙烧温度,由于比表面积急剧下降,导致光催化活性下降。然而,600° C煅烧的样品由于高的结晶度而表现出最高的比光催化活性。
Hierarchically disorder sponge-like macro/mesoporous titania was prepared by adding distilled water dropwise to a coating of tetrabutyl titanate. The results reveal that the un-calcined samples show obvious photocatalytic activity and multi-modal pore-size distribution. With increasing calcination temperatures, the photocatalytic activity and crystallinity increase. At 400°C, the calcined sample shows the highest photocatalytic activity. Further increasing the calcination temperatures results in the decrease of photocatalytic activity due to the drastic decrease of specific surface areas. However, the 600°C-calcined sample exhibits the highest specific photocatalytic activity due to high anatase crystallinity.
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期刊: NANO LETTERS
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